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Roger J. Malik
Researcher at Bell Labs
Publications - 57
Citations - 1617
Roger J. Malik is an academic researcher from Bell Labs. The author has contributed to research in topics: Bipolar junction transistor & Heterojunction bipolar transistor. The author has an hindex of 23, co-authored 57 publications receiving 1610 citations. Previous affiliations of Roger J. Malik include AT&T Corporation.
Papers
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Quantum functional devices: resonant-tunneling transistors, circuits with reduced complexity, and multiple valued logic
Federico Capasso,Susanta Sen,Fabio Beltram,Leda Lunardi,A. S. Vengurlekar,P.R. Smith,Nitin J. Shah,Roger J. Malik,A.Y. Cho +8 more
TL;DR: In this paper, resonant-tunneling bipolar transistors (RTBTs) with a double barrier in the base region are described, and the first observation of minority-electron ballistic RT is presented.
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Carbon doping in molecular beam epitaxy of GaAs from a heated graphite filament
TL;DR: Carbon doping of GaAs grown by molecular beam epitaxy has been obtained for the first time by use of a heated graphite filament as discussed by the authors, which was used for p-type doping in the base of Npn AlGaAs/GaAs heterojunction bipolar transistors.
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Optimum emitter grading for heterojunction bipolar transistors
TL;DR: In this article, a simple procedure has been used to determine the optimum emitter grading for a heterojunction bipolar transistor (ABT), leading to a negligible collector/emitter offset voltage, both of which are necessary for high performance devices.
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Bipolar transistor with graded band-gap base
TL;DR: The first compositionally graded base bipolar transistor was reported in this article, which incorporated a wide gap Al035Ga065As emitter (n = 2 × 1016/cm3 and a 4 μm thick p+ base with a DC current gain of 35 with flat, nearly ideal, collector characteristics.
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New avalanche multiplication phenomenon in quantum well superlattices: Evidence of impact ionization across the band‐edge discontinuity
Federico Capasso,J. Allam,A.Y. Cho,K. Mohammed,Roger J. Malik,A. L. Hutchinson,Deborah L. Sivco +6 more
TL;DR: In this article, a new class of very low noise avalanche photodiodes and solid-state photomultipliers are proposed. But the authors do not consider the effect of the superlattice's barrier layers on the spectral response.